Inflatable annular air bag for preventing blockage of vertical shaft during excavation of vertical shaft

Abstract

The utility model discloses an inflatable annular air bag for preventing a shaft from being blocked in shaft excavation. The inflatable annular air bag comprises an annular air bag body, an air control system, an oil outlet ring and an oil control system. An air pipe is arranged at the bottom of the annular air bag and connected with an air control system. The oil outlet ring is arranged at the top of the annular airbag; a plurality of oil holes are formed in the inner side of the oil outlet ring. And the oil outlet ring is tightly bonded with the annular air bag through hot melt adhesive and is connected with the oil control system through an oil pipe. The sectional area of the annular air bag is adjusted through the air control system, and lubricating oil is applied to the inner wall of the annular air bag through the oil control system to reduce friction resistance. The utility model can effectively avoid the accident that the well is blocked by rock ballast. Meanwhile, a protection mechanism is arranged and comprises a protection box, a storage box, a rotating head, a first rotating plate, a second rotating plate and a third rotating plate, the first rotating plate can be rotated through the rotating head, then the second rotating plate and the third rotating plate are matched to push the storage box, and storage protection of the pneumatic control system and the oil control system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy project construction, in particular to an inflatable circular ring airbag for preventing well blockage during shaft excavation. Background Technique

[0002] In the construction of vertical shafts and inclined shafts in water conservancy projects, the construction process usually involves first excavating a slag chute guiding well and then expanding the excavation from top to bottom. During the expansion excavation, the crushed stones generated are discharged through the slag chute guiding well to the lower horizontal tunnel. However, due to reasons such as unreasonable blasting design, poor geological conditions, and small cross-section of the slag chute guiding well, well blockage accidents are likely to occur, affecting the project progress and safety.

[0003] Conventional well blockage treatment methods mainly include blasting vibration method, high-pressure water dredging method, balloon top charge blasting method, manual excavation method, etc. Chinese Patent (Publication No. CN 111577291 A) discloses a method for preventing guide well blockage during reverse well excavation of an engineering vertical shaft, which uses a moving steel wire rope to dredge the blocked section. Chinese Utility Model (Publication No. CN 210888941 U) discloses an anti-slag chute blockage device for tunnel vertical shaft reverse well method construction, which places a well blockage bucket on the slag chute hole and removes the well blockage bucket after blasting. Chinese Utility Model (Publication No. CN 214950947 U) discloses a vertical shaft well blockage blasting and dredging device, which still belongs to the category of balloon top charge blasting method. In fact, analyzing the reasons for well blockage, it mainly lies in the excessive friction between the crushed stones and the slag chute hole, resulting in a low sliding speed of the crushed stones and ultimately causing the accumulation between the crushed stone particles. Therefore, reducing the friction between the crushed stones and the wall surface can effectively solve the occurrence of well blockage accidents. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose an inflatable circular ring airbag for preventing well blockage during shaft excavation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An inflatable circular ring airbag for preventing well blockage during shaft excavation, comprising a circular ring airbag, an air control system, an oil outlet ring and an oil control system.

[0007] As a further scheme of the utility model: a plurality of airbag ears are arranged on the outer edge of the top of the circular ring airbag, and an air pipe is arranged at the bottom of the circular ring airbag.

[0008] As a further scheme of the utility model: the air pipe is connected to the air control system, and the air control system can control the input and output of gas.

[0009] As a further solution of the present utility model: The oil outlet ring is placed on the top of the circular airbag, the inner diameter of the oil outlet ring is the same as that of the circular airbag, and several oil holes are provided on the inner side of the oil outlet ring.

[0010] As a further solution of the present utility model: The oil outlet ring and the circular airbag are tightly bonded by hot melt adhesive, and the oil outlet ring and the oil control system are connected by a oil pipe.

[0011] As a further solution of the present utility model: A protection mechanism is provided outside the air control system and the oil control system, and the protection mechanism includes a protection box and a storage box, and the storage box is slidably connected to the inner side wall of the protection box.

[0012] As a further solution of the present utility model: A rotating head is rotatably connected to the inner wall of the protection box, a rotating plate one is welded to the outer wall of the bottom of the rotating head, two groups of rotating plates three are rotatably connected to the outer wall of the top of the storage box, one group of the rotating plates three is rotatably connected to the rotating plate one, a rotating plate two is rotatably connected to the outer wall of the top of the rotating plate three, the other end of the rotating plate two is rotatably connected to the outer wall of the bottom of the rotating plate one, and a spring two is welded between the storage box and the inner side wall of the protection box.

[0013] As a further solution of the present utility model: A vertical box is welded to the outer wall of the top of the protection box, an arc-shaped soft plate is bonded between the outer wall of the bottom of the protection box and the outer side wall of the vertical box, a spring one is welded between the arc-shaped soft plate and the outer wall of the top of the protection box, a docking head is movably inserted into the inner wall of the vertical box, and the docking head is matched with the rotating head.

[0014] Compared with the prior art, the present utility model provides an inflatable circular airbag for preventing well blockage in shaft excavation, and has the following beneficial effects:

[0015] 1. In the present utility model, the friction between the stone slag and the slag guiding shaft can be reduced, the cross-section of the stone slag flow can be regulated, and the occurrence of stone slag well blockage accidents can be effectively avoided, and it has the advantages of safety, high efficiency, simple operation and reusable.

[0016] 2. In the present utility model, by setting the protection mechanism as a combination of a protection box, a storage box, a rotating head, a rotating plate one, a rotating plate two, a rotating plate three and a spring two, the rotating plate one can be rotated by the rotating head, and then the rotating plate two and the rotating plate three cooperate to push the storage box to realize the storage and protection of the air control system and the oil control system.

[0017] The parts not involved in the device are the same as the prior art or can be realized by the prior art. The structure of the present utility model is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an inflatable circular airbag for preventing well blockage in shaft excavation proposed by the present utility model;

[0019] Figure 2 Schematic diagram of an embodiment of an inflatable circular ring airbag for preventing well blockage in shaft excavation proposed by the present utility model;

[0020] Figure 3 Schematic diagram of the protection mechanism structure of an inflatable circular ring airbag for preventing well blockage in shaft excavation proposed by the present utility model;

[0021] Figure 4 Schematic diagram of the internal structure of the protection mechanism of an inflatable circular ring airbag for preventing well blockage in shaft excavation proposed by the present utility model;

[0022] Figure 5 Schematic diagram of the fully sectioned structure of the protection box of an inflatable circular ring airbag for preventing well blockage in shaft excavation proposed by the present utility model;

[0023] Figure 6 Schematic diagram of the turning handle structure of an inflatable circular ring airbag for preventing well blockage in shaft excavation proposed by the present utility model.

[0024] In the figure: 1, circular ring airbag; 2, air control system; 3, oil outlet ring; 11, airbag ear; 21, air pipe; 31, oil hole; 32, oil pipe; 33, oil control system; 4, rivet; 5, slag guiding well; 6, shaft surrounding rock; 7, stone slag; 8, slag outlet hole; 9, protection box; 91, vertical box; 10, turning handle; 12, arc-shaped soft board; 13, storage box; 14, spring one; 15, rotating head; 16, rotating plate one; 17, docking head; 18, spring two; 19, rotating plate two; 20, rotating plate three. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Embodiment 1

[0027] An inflatable circular ring airbag for preventing well blockage in shaft excavation, as Figure 1-6 shown, includes a circular ring airbag 1, an air control system 2, an oil outlet ring 3, and an oil control system 33.

[0028] A number of airbag ears 11 are provided on the outer edge of the top of the circular ring airbag 1. The number of the airbag ears 11 is not less than 6, the length is not less than 20 cm, and the width is not less than 10 cm.

[0029] An air pipe 21 is provided at the bottom of the circular ring airbag 1. The air pipe 21 is connected to the air control system 2, and the air control system 2 can control the input and output of gas.

[0030] The oil outlet ring 3 is placed on the top of the circular airbag 1. The inner diameter of the oil outlet ring 3 is the same as that of the circular airbag 1. A number of oil holes 31 are provided on the inner side of the oil outlet ring 3.

[0031] The oil outlet ring 3 and the circular airbag 1 are tightly bonded by hot melt adhesive. The oil outlet ring 3 and the oil control system 33 are connected by a oil pipe 32.

[0032] The wall thickness of the circular airbag 1 is not less than 5 mm.

[0033] Embodiment 2

[0034] An inflatable circular airbag for preventing shaft excavation from blocking wells. In order to protect the air control system 1 and the oil control system 33, as Figure 1 - Figure 6 shown, a protection mechanism is provided outside the air control system 1 and the oil control system 33. The protection mechanism includes a protection box 9 and a storage box 13. The storage box 13 is slidably connected to the inner side wall of the protection box 9. A rotating head 15 is rotatably connected to the inner wall of the protection box 9. A rotating plate one 16 is welded to the outer wall of the bottom of the rotating head 15. Two groups of rotating plates three 20 are rotatably connected to the outer wall of the top of the storage box 13. One group of the rotating plates three 20 is rotatably connected to the rotating plate one 16. A rotating plate two 19 is rotatably connected to the outer wall of the top of the rotating plate three 20. The other end of the rotating plate two 19 is rotatably connected to the outer wall of the bottom of the rotating plate one 16. A spring two 18 is welded between the storage box 13 and the inner side wall of the protection box 9;

[0035] Both the air control system 1 and the oil control system 33 can be installed inside the storage box 13. The storage box 13 is received inside the protection box 9 for protection to avoid damage caused by falling stones. When the air control system 1 and the oil control system 33 need to be repaired, rotate the rotating head 15 to make the rotating plate one 16 rotate, and the rotating plate two 19 and the rotating plate three 20 cooperate to push out the storage box 13, which is convenient for personnel to repair.

[0036] A vertical box 91 is welded to the outer wall of the top of the protection box 9. An arc-shaped soft plate 12 is bonded between the outer wall of the bottom of the protection box 9 and the outer side wall of the vertical box 91. A spring one 14 is welded between the arc-shaped soft plate 12 and the outer wall of the top of the protection box 9;

[0037] The spring one 14 at the bottom of the arc-shaped soft plate 12 can generate a certain buffer when the arc-shaped soft plate 12 resists the falling slag and stones, avoiding excessive deformation of the device due to the impact and making it unable to be opened.

[0038] A docking head 17 is movably inserted into the inner wall of the vertical box 91. The docking head 17 cooperates with the rotating head 15;

[0039] When in use, a turning handle 10 can be inserted to make the docking head 17 dock with the rotating head 15, and rotate the rotating head 15 to open the storage box 13, and then pull it out after use.

[0040] Example 3

[0041] In order to better use an inflatable circular airbag for preventing shaft excavation from blocking the shaft, the following describes the usage method of this device:

[0042] As Figure 2 shown, place the circular airbag 1 in the slag guiding shaft 5, firmly connect the ear of the airbag with the surrounding rock 6 of the shaft using rivets 4, connect the air pipe 21 with the air control system 2, and connect the oil pipe 32 with the oil control system 33.

[0043] Start the air control system 2, input air into the circular airbag 1 until the airbag is full, and then turn off the air control system 2.

[0044] Start the oil control system 33, input lubricating oil into the oil outlet ring 3, the lubricating oil flows out from the oil hole 31 and flows downward along the inner wall of the circular airbag 1 until lubricating oil drops are observed at the bottom of the circular airbag 1, and then turn off the oil control system 33.

[0045] Pour the crushed stones 7 generated after blasting into the circular airbag 1 manually or mechanically. Due to the presence of lubricating oil, the friction between the crushed stones 7 and the circular airbag 1 is greatly reduced, and the crushed stones 7 finally fall into the slag outlet hole 8.

[0046] If the crushed stones 7 have difficulty coming down, start the air control system 2 to extract the air in the airbag 1, increase the cross-section, and let the crushed stones 7 slide down faster.

[0047] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An inflatable annular airbag for preventing well blockage during vertical shaft excavation, characterized in that: It comprises a circular air bag (1), an air control system (2), an oil outlet ring (3) and an oil control system (33); The air control system (2) and the oil control system (33) are provided with a protection mechanism outside, and the protection mechanism includes a protection box (9) and a storage box (13). The storage box (13) is slidably connected to the inner side wall of the protection box (9). The inner wall of the protection box (9) is rotatably connected to a rotating head (15). The bottom outer wall of the rotating head (15) is welded with a rotating plate 1 (16). The top outer wall of the storage box (13) is rotatably connected to two groups of rotating plates 3 (20). One group of rotating plates 3 (20) is rotatably connected to the rotating plate 1 (16). The top outer wall of the rotating plate 3 (20) is rotatably connected to a rotating plate 2 (19). The other end of the rotating plate 2 (19) is rotatably connected to the bottom outer wall of the rotating plate 1 (16). A spring 2 (18) is welded between the storage box (13) and the inner side wall of the protection box (9); A vertical box (91) is welded to the top outer wall of the protection box (9); an arc-shaped soft plate (12) is bonded between the bottom outer wall of the protection box (9) and the outer side wall of the vertical box (91); a spring (14) is welded between the arc-shaped soft plate (12) and the top outer wall of the protection box (9); a docking joint (17) is movably inserted into the inner wall of the vertical box (91); and the docking joint (17) is matched with a rotating head (15).

2. The inflatable annular airbag for preventing well blockage during vertical shaft excavation according to claim 1, characterized in that: A plurality of bag ears (11) are provided at the outer edge of the top of the annular airbag (1), and an air tube (21) is provided at the bottom of the annular airbag (1).

3. The inflatable annular airbag for preventing well blockage during vertical shaft excavation according to claim 2, characterized in that: The air pipe (21) is connected to the air control system (2), and the air control system (2) can control the input and output of gas.

4. The inflatable annular airbag for preventing well blockage during vertical shaft excavation according to claim 3, characterized in that: The oil outlet ring (3) is placed on the top of the annular airbag (1); the inner diameter of the oil outlet ring (3) is the same as the inner diameter of the annular airbag (1); and a plurality of oil holes (31) are provided on the inner side of the oil outlet ring (3).

5. The inflatable annular airbag for preventing well blockage during vertical shaft excavation according to claim 4, characterized in that: The oil outlet ring (3) is tightly bonded to the annular airbag (1) by means of hot melt adhesive, and the oil outlet ring (3) is connected to the oil control system (33) by means of an oil pipe.

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